Taylor Swift had Avril Lavigne as her special guest on Saturday’s 1989 concert at Petco Park in San Diego, and the two music stars sang the latter hit “Complicated.” Watch the video below.

Swift introduced Lavigne by saying, “She’s one of my favorite artists, and we’ve been texting all week. Today, I got to meet here. Please make some noise. Avril Lavigne is here!” And with that, the two launched into “Complicated.” Swift and Lavigne sang the song as they strutted up the runway and, at times, had their arms around each other as fireworks blasted off behind them.

After the show, Lavigne posted on Instagram, “@taylorswift …… She is a Doll. Thank you Taylor for having me up on stage and thank you San Diego #Complicated #Grateful.” She also tweeted, “Such a Pleasure to perform ‘Complicated’ tonight with @taylorswift on her #1989 world tour! She ROCKS.” For her part, Swift tweeted later, “So incredible sharing the stage with @AvrilLavigne! ‘Complicated’ is such a brilliant pop song and I just love her.”

Earlier last week, there seemed to be a misunderstanding that tied together Lavigne and Swift. After Swift supposedly “liked” a Tumblr post that showed photos of how she gets up and close with her fans, contrasted with pictures of Lavigne and other singers who were snapped standing at awkward distances from theirs, Lavigne tweeted, “Comparison is judging and judging a person does not define who they are it defines who you are. We all Love our fans.” Lavigne added in another tweet that featured a collage of her closely interacting with fans, “So let’s keep it all about the love and stay positive.” It should be noted, though, that Swift never directly shaded Lavigne or even commented on the comparison.

Obviously, there was no bad blood between the two women because they happily performed Lavigne’s “Complicated” on Saturday night in San Diego. Check out the video below of Swift and Lavigne.